Geoff Winkless <pgsqladmin@xxxxxxxx> writes: > On 31 January 2016 at 19:53, David G. Johnston > <david.g.johnston@xxxxxxxxx> wrote: >> A PRIMARY KEY enforces a UNIQUE, NOT NULL constraint and additionally allows > [snip] > I would just remove the whole paragraph. A primary key does what it > does, a unique constraint does what it does. I'm not really sure why > you need to link them. I think it is useful to compare them; the only problem is claiming that they're equivalent. I've applied some doc updates based on this discussion. http://git.postgresql.org/gitweb/?p=postgresql.git;a=commitdiff;h=c477e84fe2471cb675234fce75cd6bb4bc2cf481 regards, tom lane -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
